I have not. The biggest changes I've made to shipping that seem to help hatch rates are decreasing the distance I'll order from (about 700 miles) and requesting "hold for pickup".Fingers crossed! Has anyone ever tried shipping with UPS or FedEx to see if they're any better? USPS seems so awful that any savings up front seems a false economy if "the goods" don't arrive in decent shape.
One of my worst hatches was USPS express shipped. Won't make that mistake again. Cost more and rougher handling.